Better exception-handling for create() and reply() cf. #113
Removed inexplicable line of code
Better exception-handling for add() cf. #113
Better exception-handling for moderate_thread() cf. #113
Better exception-handling for edit() and report() cf. #113
Moved typical POST-request error to variable
Better exception-handling for move_thread() cf. #113
Better exception-handling for remove() cf. #113
Better exception-handling for merge_thread() cf. #113
Better exception-handling for reports() cf. #113